High-tension magneto.



PATENTED SEPT. 8, 1908.

E. B. JAOOBSCN. HIGH TENSION MAGNETO. APPLICATIQN FILED JAN.1G,1907.

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No. 898,370. PATENTED SEPT. 8, 1908. E. B. JAGOBSON' HIGH TENSIONMAGNETS.

APPLIUATION'II LED JAN.16, 1907.

E SHEETS-SHEET 2 FATENTED SEPT. 8, 1968.

E. B. JACOBSON.

HIGH TENSION MAGE ETO.

gruonlon FILED JAN. 16, 1907.

4 SHEETSSHEET 3..

FATENTED SEPT. 8, 1908. AOQBSON HIGH TENSIDN MAGNETO.

AM I r 4 SHEETS-SEEET 4.

LGATiON FILED JAN.

Q w mu w il' i Jud H EDWARD B. JACOBSON, OF PITTSFIELD, MASSAUHL'SETTSCOIL COMPANY, U)? Pl'lTSFlliLl), MASSACHL'M HIGH-TE NSION MAGNE T0.

N0. seasro.

Application filed January 16,

Specification of Letters Patent.

Patented Sept. 8, 1908. 1907. Serial No. 352,648.

To (ZZZ whom it may concern: 1 Be it known that l, EDWARD B. .liiconsoN,a of the United States of America, re l sw ne; at Pittslicld, in thecounty of Bork a 'e and State of Massachusetts, have in- Vented neu anduseful inmrovemcnts in iligh iension Magnetos, of which the l'ollown isa specification. I Tnis invention relates to imprwemcnts in l electricgenerators of the t 'pe known as Inagl neto-generators for pro ucingalternating currents of high voltage, and is designed par- I ticularlyfor igniting the charge of an internal combustion engine Where it ishighly desirable and absolutely necessary that every char e should bethoroughly ignited in order to obtain the best results.

The object of the invention is therefore to provide a magneto electricalgenerator that will successfullyignitc the combustible charge Withoutfailure.

intention consists broadly in combintfith series permanent magnets of amagneto a rotatable screen composed of magnetic and nonuncgnetlcportions by which the hues of force that pass from one pole piece toanother can be directed from the soft iron pole pieces through thewindings of the armature, and also in providing means for suitably rotaing this screen whereby the electro-1uotive force generated in thearmaone he suitably varied.

Further details of the object and nature of invention will be fully setforth in the deof the invention.

' LWlIlgS forming part of this appl1 we 1 is a vertical longitudinal ewor the generator in a vertical sing through the of the armau, end thesecondary shaft and distributor re hanism. Fig. 2 is a sectionalelevation is dotted line 22 of Fig. 1 through the iiis'trih'uter contactring and distributor. 3 is an end elevation of Fig. 1 showing the muteand break mechanism after the re more of the housing therefor, alsoshowing the Std 13R88O0I1t1Ct-plitt8. Fig. 4 is a vertical. transversesectional View of the magneto on the line 4---4t, Fig. 1, showing thetwo windings on the armature, the cylindrical screen, end the condenser.Fig. 5 is a dia g .in'nistio View of the wiring of my magneto. .EL 6 38a perspectiveyi'ew or the armature 5 core and screen the screen beingindicated as made of separate pieces.

Referring to those drawings in detail, a and b designate the series ofpermanent magnets, the magnet being preferably shorter than tho magneta. The lower end of the magnets (1. rests on the uppcrsurl'ace ol thebase-piece c.

d designates the soft iron polo pieces that are permanently secured tothe magnets a and b by any suitable means, as by machiuescrews.

The base-piece c is secured to the polopieces (1 by .nioans of the bolts(:1. The threaded openings 6' provide means for fixedly securing themachine to a permanent support.

f designates a bridge picco, preferably made of aluminium, and mountedon the upper end of the polo-pieces (I, as indicated at the point 1.total ably mounted within the polo-pioces (l is a cylindrical shell orscreen i which composed of magnetic and non-magnetic material,- theportion 2' being 11011- nnignetic and the portion magnetic, as soft ironor steel. The screen or shell h is provided with a handle It so that thesame may be readily rotated. Mounted on the bridgepice fis a condenser76 of suitable capacity 80 and contained within the housing is.

m' designates the armature having two windings n and 0,-n being theprimary winding, and 0 the secondary Winding.

0 designates suitable binding or insulating material. v

The right-hand end of the armature m is provided with a spur gear p forengagement with another s )ur mounted on a suitable rotating shaft ofthe motor, the gear 3) being of such diameter that the rotation of thearmature shaft may be accurately timed in relation to the movements ofthe engine pistons, as readily understood. The lefthand end of thearmature m is n'ovidod with 9.5 a metallic sleeve (1 that is rigidlyfastened to the armature head 1". sleeve g is a bushing 8 material, asfiber or rubber, and mounted Within the bushing is a metalliccylindrical brush-holder tfor receiving the carbon brush u andcompression s )ring '21 for maintaining the brush u extende w designatesone terminal of the high tension winding that is connected with losecondary windings oi the armature at one Mounted within this made frominsulating end, and to the metallic c. 'lindrical brushholder t at itsother end. The sleeve g and the shaft at are suitably mounted inballbearings, as designated at y, of any approved design.

z designates a collector ring secured to the periphery of the armatureand insulated therefrom by means of the ring 2. terminal of the rimarywinding n is con nected to this ring, as designated by the numeral 3,and the other terminal is connected to the "condenser and grounded, aswill be described.

4 designates a carbon or other suitable brush bearing on the collectorring 2 that is incloscd within the metallic cylindrical casing 5, whichis internally threaded at its outer end and provided with a closing plug(5.

7 designates a compression spring for imparting to the brush 4 therequisite tension or pressure which engages the ring 2.

The metallic casing 5 is electrically connected to the condenser is bymeans of the wire 8. The metallic cylindrical casing 5 is alsoelectrically connected to the advance contact-plate 19, engaging whichis an advance brush 20 (preferably carbon) mounted within the metalliccylindrical casing 21 which is provided with a closing plug 22 and acompression spring 23, the latter serving the purpose of holding thebrush 20 in good electrical contact with the advance contact plate19.

24 designates a supporting plate for the metallic cylindrical casing 21,and also provides supporting means on the upright part 24 for thecontact screw25,said supporting means being designated by the numeral26,

and held in place on the plate 24 by the screw 27. Rotatably mounted onthe supporting plate 24 is a make and break lever 28 y means of the pin29, the lower end of the lever 28 being provided with an anti-frictionroller 30 that engages a make and break cam 31 mounted on the armatureshaft w. The upper arm of the make and break lever 28 carries theordinar platinum contact point 32 which engages t 1e oppositecontact-point 25. 33 is a tension device for engaging the lower arm ofthe make and break lever .28 for placing suitable pressure on the lever.'lhis tension device is adjustably mounted in the lug 34, as shown.

In order to vary the time of the spark, the plate 124 on which the makeand break lever 28 is mounted is rotated. 'lhis rotary movement has theeffect of moving the roller 30 either towards or away from the make andbreak cam 31 on the shaft 1:, according to whether the operator wishesto advance or retard the spark. At the same time that the plate 24 ismoved, the brush 20 moves or slides upon the advance contact plate 19.

Mounted in roller bearings 35 and 36 is a secondary shaft 37 that isgeared to the pin- One seasvo ion 38 on the armature sleeve g by meansof the gear 40 which carries a plate 41 of insulating materiai to whichis secured the distributer 42 which is made of some suitable insulatingmaterial, as hard rubber. Extending through this distributer 42 andabout onehalf way through the plate of insulating material 41 is ametallic cylindrical brush-holder 43 in which is mounted the compressionspring 44 and brush 45 that normally engages a on -shaped metalliccontactiece 46 mounte on the 11 per end of the exible transfer plate 47whic is secured to the insulated distributer contact ring 48 b r meansof the screw 49. The transfer piate 47 extends below the ring 48 andcarries at its lower end another cup-shaped metallic contact-piece 50similar to the oneat its u per end, and with wh ch-the brush a normal yengages. The distributer arm 42 also carries a brush-holder 51 which iselectrically connected to the brush-holder 43 see Fi l and contains acom ression spring 52 and brush 53 which norma y is in contact with theinner surface of 48, as shown. Mounted within the distributercontact-rin 43 and fiush with the inner surface thereoi are thedistributer contact pieces 54 which are electrically connect ed to thesectional ring 55 that is secured to the distributer contact ring 48.The terminals of the cables 56 are connected to the sectional ringiece'55 whereby the current from the brus 53 can flow in successionthrough the contact-pieces 54 to the cables 56, as the distributer 42 isrotated.

Referring to Fig. 5 which is a diagrammatic view of the wirin'g,-57 desiates the usual spark-plugs that are screwe into the casing of thecombustion cylinders. The

wires 58 shown connected to the plugs 57 and to the wire 59 in realityre resent the grounder framework of the mac nne.

6O designates a wire connected with one terminal of the condenser 7c andthe other terminal with the ground or framework of the machine. Thiswire is also connected to the primary winding n and to the secondarywinding 0 of the armature, as shown. As the armature rotates, thecurrent is generated in the rimary winding 'n and passes from the brusi4 through the advance'contact-plate 19, brush 20, contact-points 25 and32' (when the same are closed) through the wire 59 (framework of themachine) wire 60, to the op osite terminal of the condenser k to chargetie same, and when the contact oints 25 and 32 are 0 en, the condenser7a will be discharged in t ie opposite direction through the wire 60,primary winding n, in-

the insulating ring thumb-nut 65 for convenience in removing terminal ofthe the same, as readily understood.

In the operation of the machine, it should be stated that the roller isnot in contact with the cam 31 most of the time so that the contactpoints 25 and are closed, and that just at the moment "that the contactpoints are separated the condenser is discharged and he spark produced.

What I claim, is

1. An electric generator having in combination an armature )rovided"with two windings in inductive relation to each other, compound fieldmagnets, condenser included in the prim winding, a make and breakmechanism in the primary, spark terminals, a distributor mechanisminterposed between the secondary winding and one of the spark terminals,and an electrical conncction extending between the other spark terminaland the secondary winding, and means for varying the magnetic iluxthrcughthe armature whereby the electro-niotive force produced may bevaried, said means including a rotatable screen, the cylindrical surfaceof which is composed entirely of magnetic and non-magnetic material andhaving unbroken outer cylindrical surface, as described.

2. An electric generator having in combination an armature havingprimary and secondary windings thereon, field magnets, a collector ringcarried by the armature, one primary connected thereto, the otherterminal of tie primary being grounded, a second ground connectionconnected to the collector ring, a and break mechanism interposedbet-ween the collector ring and the second ground connection, thesecondary windin hardng ter minal connected to a spark-ping end itsother terminal grounded, and means ior varying the magnetic llux throughthe arn'iature whereby the electroqnotive force produced may be varied,said means including a rotatable screen, the cylindrical surface ofwhich.

is unbroken. from end to end,

3. An electric generator having in combe nation, a compound iieldmagnet, an armature provided with. prin'iary and secondary windings, anarmature shaft, a secondary shaft operatively connected to e armatureshaft, a dist-ributer connected to s, terminal of the secondary vJi.dirq a contactpiece adapted to be n v -1 3 en eged 0y toe testimuter,spark terminal connected with contaet-piece, an electrical connectiontending between the spark terminal and the exthe other terminal of thesecondary, a collecter,.

t'ac', as described.

4. A magneto electric generator having in combination an armature maryand secondary windings, a rotatable screen interposed between the polepieces and the armature, said screen eing composed of magnetic andnon-magnetic material -whereby the inductive effect of the field on thewindings may be changed, a condenser connected in the primary winding,means opcrativcly connected to the armature shaft for electricallyconnecting the sec ondary winding to the external circuit, conductingdevices interposed between the external circuit and the pe'imary andsecondary windings, a make and break mechanism included in the circuitof the primary, the niche and break device including a rotatablesupporting plate, and an upright, as: 24, forming a part thereof, aleverpivoted to the supporting plate and provided with a roller at one end, acam for engaging the roller, and acontact-point and brush "arried by theupright, the brush being electrically connected to the. primary, asdescribed.

5. An ele rtric generator having in combination an armature, a shafttherefor provided with primary and secondary windings, a secondary shaftoperatively connected to the armature shaft, a make and break mechanismincluded in the primary circuit, means for ad ancing or retarding theoperation of the make and break mechanism, a distributcr carried by thesecondary shaft, elecral connec 'ns between the external cir cuit andthe primary and secondary windings, a condenser connected to theexternal circuit, and'means for varying the magnetic ilUX through thearmature whereby the elec tie-motive force induced in the secondary maybe varied, the distributor com n'ising a nah-holder electricallyconnected to the :lary winding, a second brush. iohlcr in electricalconnection with the sec ondery, a sectional ring connected to the ereprovided with pri-' nets, an arinature, primary and secondary wmdlngsthereon, a rotatable screen located between the ma'gnet s.and armatureand com posed oimagnetie'itnd non-magnetic materials,' the nonmagneticmaterial being formed from a single integral piece and having an openingin which is fitted the magnetic 'iece fiuslrwith the outer surface ofthe cylin er, and means for rotating the same,

. whereby the flux through the armature may be varied, as described.

7. A magnetic electric generator having in combination a series ofpermanent magnets, one end of the armature being provided with a sleeve,a bushing of insulating material Inouhted Within said sleeve andcarrying a metallic cylindrical brush-holder, the same beingelectrically connected to the second- EDWARD B. JACOBSON.

Witnesses:

HIRAM B. WELLINGTON, Jr., HIRAM WEITLINGTON.

